class Employee:
    name = ''
    position = ''
    def __init__(self, name, position):
        self.name = name
        self.position = position
    def sayHello(self):
        print(f"Hello, I am {self.name} and I am a {self.position}.")
class CEO(Employee):
    def __init__(self, name):
        super().__init__(name, "CEO")
    def sayHello(self):
        super().sayHello()
c = CEO("zhang")
c.sayHello()